Alert archive / Hawaii / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 1, NWS Honolulu, HI

January 29, 2008Hawaii County, Hawaii

NWS Honolulu, HI issued this severe thunderstorm warning at Jan 29, 2008, 2:04 PM HST for Hawaii County, Hawaii. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 29, 2008, 2:04 PM HST (00:04 UTC)
Expired: Jan 29, 2008, 2:24 PM HST
In force: 20 min
Issued by: NWS Honolulu, HI
Area: Storm-based polygon

County Hawaii County, HI

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Honolulu, HI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 29, 10:00 AM HST, 4 hours 4 minutes earlier.

Area forecast discussion, Jan 29, 10:00 AM HST, 4 hours 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
1000 AM HST TUE JAN 29 2008

.SYNOPSIS...
STRONG HIGH PRESSURE NORTH OF THE STATE WILL PRODUCE FRESH AND GUSTY
TRADE WINDS THROUGH THE WEEKEND. SHOWERS WILL FAVOR WINDWARD AND
MAUKA SECTIONS...WITH SOME SHOWERS REACHING LEEWARD AREAS. AN UPPER
LOW OVER THE ISLANDS WILL CAUSE SOME SHOWERS TO BE LOCALLY HEAVY...
WITH THUNDERSTORMS POSSIBLE TODAY ACROSS MAUI COUNTY AND THE BIG
ISLAND.

&&

.DISCUSSION...
WATER VAPOR IMAGERY SHOWS AN UPPER LOW OVER THE STATE. THE AIRMASS
UNDER THIS LOW IS UNSTABLE. 12Z SOUNDINGS FROM PHLI/PHTO SHOW
FREEZING LEVELS NEAR 10KFT...WITH WET BULB ZERO HEIGHTS DOWN TO
8-9KFT. 16Z-18Z ACARS SOUNDINGS FROM PHNL/PHTO ALSO SHOW FREEZING
LEVELS NEAR 10KFT. IR SATELLITE SHOWS AN AREA OF DEEP CONVECTION
ALONG THE EASTERN HALF OF THE UPPER LOW...WITH IR CLOUD TOP
TEMPERATURES BELOW -35C. RADAR ECHO TOPS ARE NEAR 30KFT. THE
OBSERVER AT PHTO AND A SPOTTER IN HILO BOTH REPORTED THUNDER FROM A
CELL WITH A -30C TO -35C CLOUD TOP TEMPERATURE. HAVE ADDED AN
ISOLATED THUNDERSTORM TO MAUI COUNTY AND THE BIG ISLAND ZONES...IN
ADDITION TO THE COASTAL AND OFFSHORE WATERS.

WITH THE COMBINATION OF LOW FREEZING LEVELS AND DEEP CONVECTION...
HAVE ISSUED WINTER WEATHER ADVISORIES FOR HALEAKALA AND BIG ISLAND
SUMMITS. ON MAUI...HALEAKALA RANGERS AND INSTITUTE FOR ASTRONOMY
PERSONNEL REPORT SNOW AND ICE DOWN TO 7KFT WITH UP TO AN INCH OF
SNOW ACCUMULATION AT THE SUMMIT. ON THE BIG ISLAND...MAUNA KEA ROAD
CREWS REPORT UP TO AN INCH OF SNOW WITH ICY CONDITIONS ON THE ROADS.
ADDITIONAL SNOW ACCUMULATION FORECASTS WILL BE TRICKY...AS THEY ARE
TIED TO THE ISOLATED CONVECTIVE SHOWERS THAT REACH THE SUMMITS. 1
TO 3 INCHES LOOKS LIKE A GOOD RANGE. WILL CARRY THE WINTER WEATHER
ADVISORY THROUGH TONIGHT.

AT LOWER ELEVATIONS...THE UNSTABLE AIRMASS WILL LEAD TO LOCALLY
HEAVY RAINFALL. STORM MOTION IS TO THE WEST-SOUTHWEST NEAR 30 MPH.
THE FAST MOTION AND SUBSEQUENT BRIEF DURATION FOR SHOWERS SHOULD
LIMIT FLOODING POTENTIAL. HOWEVER...INDIVIDUAL SHOWERS MAY BE HEAVY
AND CAUSE LOCALIZED PROBLEMS SUCH AS TEMPORARY PONDING OF WATER. THE
STRONG TRADE WINDS WILL ALSO BLOW SHOWERS FURTHER INLAND ACROSS
LEEWARD SECTIONS OF THE SMALLER ISLANDS.

BY WEDNESDAY...12Z NAM/GFS SHOW MID-LEVEL TEMPERATURES WARMING A
COUPLE DEGREES. THE NAM IS A BIT FASTER THAN THE GFS IN DECREASING
THE THUNDER POTENTIAL...BUT THE AIRMASS REMAINS UNSTABLE. FORECAST
SOUNDINGS SHOW FREEZING LEVELS CLIMBING NEAR 12KFT. THROUGH THE
LONGER TERM...THE GFS AND ECMWF ARE TRENDING TOWARD LOWER HEIGHTS
OVER THE ISLANDS...KEEPING AN UPPER TROUGH NEAR THE STATE THROUGH
EARLY NEXT WEEK. DIFFERENCES EMERGE BY THE END OF THE FORECAST
PERIOD RELATED TO HOW THE MODELS HANDLE A REINFORCING PIECE OF
ENERGY DIGGING IN FROM THE NORTHWEST. BOTH 12Z GFS AND ECMWF NOW
SHOW AN INVERTED SURFACE TROUGH DEVELOPING NEAR THE STATE BY MONDAY.

&&

.MARINE...
SMALL CRAFT ADVISORIES CONTINUE FOR ALL COASTAL WATERS DUE TO WINDS
AND SEAS. THESE CONDITIONS WILL CONTINUE THROUGH THE WEEKEND. THE
TRADE WIND SWELL WILL LEAD TO LARGE AND ROUGH SURF FOR EAST FACING
SHORES. THE NORTHWEST SWELL IS SMALLER THAN ANTICIPATED...AND WE
HAVE DROPPED THE HIGH SURF ADVISORY FOR NORTH FACING SHORES.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
HIGH SURF ADVISORY UNTIL 6 PM HST WEDNESDAY FOR KAUAI WINDWARD-
OAHU KOOLAU-OLOMANA-MOLOKAI WINDWARD-MAUI WINDWARD WEST-WINDWARD
HALEAKALA-SOUTH BIG ISLAND-BIG ISLAND NORTH AND EAST.

WINTER WEATHER ADVISORY UNTIL 6 AM HST WEDNESDAY FOR HALEAKALA
SUMMIT-BIG ISLAND SUMMITS.

SMALL CRAFT ADVISORY UNTIL 4 AM HST WEDNESDAY FOR ALL HAWAIIAN
WATERS.

&&

BRAVENDER

In the hours before

Local storm report, Jan 29, 12:48 PM HST, 1 hour 16 minutes before

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Nearby

Severe Thunderstorm Warnings in Hawaii, 2008 Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.